• Journal of the Korean Institute of Telematics and Electronics S
• /
• v.36S no.1
• /
• pp.51-59
• /
• 1999

In this paper we propose the technique for tracking players and a ball and for obtaining players' ground traces using image mosaic in general soccer sequences. Here, general soccer sequences mean the case that there is no extreme zoom-in or zoom-out of TV camera. Obtaining player's ground traces requires that the following three main problems be solved. There main problems: (1) ground field extraction (2) player and ball tracking and team indentification (3) player positioning. The region of ground field is extracted on the basis of color information. Players are tracked by template matching and Kalman filtering. Occlusion reasoning between overlapped players in done by color histogram back-projection. To find the location of a player, a ground model is constructed and transformation between the input images and the field model is computed using four or more feature points. But, when feature points extracted are insufficient, image-based mosaic technique is applied. By this image-to-model transformation, the traces of players on the ground model can be determined. We tested our method on real TV soccer sequence and the experimental results are given.

• Journal of the Korean Data and Information Science Society
• /
• v.22 no.6
• /
• pp.1053-1063
• /
• 2011

Social network analysis is the social statistical analysis of any social structure involving a stream of mutual information between observations. In this study we used the results of passes between players in a soccer game. The analysis contents are as follows. (1) Players with important or leading roles are identified. (2) Players are assessed by pass frequency and the success rate of passes. The purpose of this study is for use as basic data for future team strategy, and achieves this by evaluating the role of each individual player within a team. In this study, social network analysis without separating positions is conducted, and is also performed for defensive and attacking positions respectively. The results of this study are as follows: First, when complete team data were available, the players performing leadership roles were Jung-woo Kim, Sung-yeung Ki and Chung-young Lee, whereas Jeong-su Lee acted as a sub-leader. In case of data for defensive positions Jeong-su Lee was a leading player, and in terms of attacking positions, all of the players excelled in the game and could be evaluated as playing lead roles.

• Bulletin of the Society of Naval Architects of Korea
• /
• v.42 no.1 s.143
• /
• pp.47-50
• /
• 2005

최근 Containership의 대형화가 진행됨에 따라 선수부의 선형 변화에 따른 선체의 구조부재 배치에 상당한 변화가 필요하게 되었다. 선수구조는 선형 변화 특히, Bow Flare Angle의 작은 변화에도 Bow Impact Pressure가 상당히 민감하게 반응함으로 외력에 의한 구조 배치 변경 및 추가적인 구조보강에 대한 여유를 갖고 설계를 진행할 필요성이 요구된다. 따라서, 본 논문에서는 선수부의 선형 및 구조 배치 변화에 따른 강도 평가를 구조해석을 통하여 구조 안정성을 검증하였으며, 구조 안정성 평가 절차 및 구조 해석 결과에 따른 구조 최적 배치 및 구조개선 사항을 간략히 정리하였다.

• Journal of Digital Convergence
• /
• v.15 no.11
• /
• pp.535-546
• /
• 2017

The purpose of The purpose of this study is to empirically investigate the relationships among achievement goal-orientation, sports confidence, and exercise commitment in university student-athletes. To fulfill this purpose, data were collected from 347 student-athletes enrolled in universities located in Seoul and the Gyeong-In area, and analysis thereof was carried out. Conclusion drawn from the performance of this study is as follows: First, university student-athletes' achievement goal-orientation has significant effects on their sports confidence. Second, university student-athletes' sports confidence has significant effects on their exercise commitment. Third, university student-athletes' achievement goal-orientation has significant effects on their exercise commitment. Fourth, sports confidence has indirect mediation effects on the relationship between achievement goal-orientation and exercise commitment in university student-athletes, and it was found that these factors had causal relationships. Therefore, the findings of this study show that university student-athletes' achievement goal-orientation plays an important role for their effective commitment to exercise, in the process of which sports confidence plays the role of a mediator, suggesting that psychological support as well as motor skill cultivation is necessary to enhance university student-athletes' performance.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.19 no.1
• /
• pp.179-187
• /
• 2018

This study purpose is to improve athletes by investigating the relation between the leadership behavior type of athletes and athlete satisfaction and exercise flow. The sampling method was non-probabilistic sampling method. The number of questionnaires was 381 for analyzing the data. SPSS/PC+ Window 21.0 version statistical program were used for analyzing the questionnaire answers. Frequency analysis, factor analysis, correlation analysis and multiple regression analysis were used. The study results are as follows. First, there were positive correlations between leadership behavior type of athletes and athlete satisfaction and exercise flow, but not between authoritative behavior of leader behavior type and exercise flow. Second, the effect of leadership behavior type of athletes on satisfaction of athletes was positive on social interaction related with training, instruction, and social support, on task execution related with training and instruction, and on coaching related with training, instruction, and positive feedback. Third, the effect of leadership behavior type of athletes on flow of exercise was positive on cognitive commitment related with training, instructions and positive feedback, and on behavioral commitment related with training, instructions, positive feedback, and social interaction. So, athletes will be able to perform good exercise skills if they come to the game in flowing exercise satisfaction and exercise.

• The Journal of the Korea Contents Association
• /
• v.10 no.5
• /
• pp.296-302
• /
• 2010

The purpose of this study was to examine the oral injury experiences of sport players in a bid to raise awareness of the gravity of problems related to oral injuries and the necessity of mouth guards geared toward preventing mental, physical and economic loss triggered by oral injuries. The subjects in this study were 290 sport players. After their oral injury experiences and use of mouth guards were checked, the following findings were given: 28.6 percent had suffered an oral injury. But just 33.8 percent received education about how to cope with an oral injury. 93.4 percent had never used a mouth guard, and only 25.9 percent felt the need for that. And just 28.3 percent had an intention to use it. felt the need for that. And just 28.3 percent had an intention to use it. Concerning the impact of gender, the female players used more mouth guards. The players didn't use mouth guards a lot regardless of oral injury experiences and education about that, and there was no change in the way they looked at mouth guards, either. The findings of the study illustrated that sport players as well as non-players weren't aware of the importance of mouth guards, though sport players were exposed to the danger of an oral injury all the time. Not only players but non-players should learn about the seriousness of an oral injury, and the necessity of oral guards should be stressed to prevent it.

• Journal of Korean Orthopaedic Sports Medicine
• /
• v.6 no.1
• /
• pp.50-56
• /
• 2007

Purpose: To evaluate the aspect of occurrence and transition of the elbow injuries in baseball players from childhood to adult. Materials and Methods: We had a survey and took the simple X-ray from the anteroposterior view and the lateral view of both elbows for subjects of total 320 baseball players. - each of 80 players in elementary school, middle school, high school, and professional baseball players between January and December in 2004. Results: The region of pain and the bony changes in elbow were the most frequent in medial side from all the groups of players. Especially, hypertrophy of medial epicondyle were the most numerous. As baseball players got older, the radiological changes of elbow were increased. The bony changes were found out 52 cases (65%) of the elementary school players, 66 cases (82%) of the middle school players, 68 cases (85%) of the high school players and 70 cases (88%) of the professional players out of the total 320 baseball players. Conclusion: The bony changes of the elbow in baseball players got frequent as they were getting older and increased in comparison with past.

• Journal of the Korea Society of Computer and Information
• /
• v.26 no.3
• /
• pp.119-126
• /
• 2021

The modern pentathlon is an exercise in which people and people compete, as well as exercise without equipment, exercise using equipment, and exercise with animals, and it is an exercise that includes static and dynamic exercise. The ethical issues of modern pentathlon athletes are also related to the poor environment and economic reasons, and the athlete's ethical awareness, attitude, and spirit have a great influence on the athlete's mental environment. In this study, the direction of improvement of ethical problems, which are different as important issues in modern sports, was examined, and qualitative research methods were applied to explore the sports spirit and ethics of the modern pentathlon. Correct sports should not deviate from the intended purpose of the exercise or cause or force the athlete to suffer physical or mental pain. In sports, compensatoryism can be a direct cause of improved performance or record-breaking, but sometimes it can also cause distorted athletes. Air doping has ethical issues that can cause controversy over the health or fairness of athletes, mental and physical damage to athletes, and harm. Responsibilities and ethical issues of athletes who take prohibited substances or leaders or supervisors who neglect or encourage them should be treated as very important matters. In the sports field, the reward system that is subordinate to the athlete's or leader's performance is related to the athlete's or leader's livelihood. For a fair and just game progression, it is necessary to break away from the development of athletes who are only focused on performance. The problem of Unethical issues must be overcome by emphasizing the restoration of ethics that are reasonably recognized in ideology and logic.

• Korean Journal of School Psychology
• /
• v.18 no.3
• /
• pp.371-398
• /
• 2021

Student-athletes identify themselves as athletes first and students second and experience identity foreclosure in which they rarely consider other possibilities for their career besides professional athletes. There is a gap between the career education that college student-athletes and regular students get, so we conducted this study to test the effectiveness of a career education program. The proposed career education program was based on Super and Ginsberg's career development theory and Holland's career choice theory. Data were collected from 13 college student-athletes using a pretest-posttest research design and analyzed using a t-test. The program was conducted in the form of 90-minute weekly sessions over 3 weeks. The program's effectiveness was measured in terms of participants' stress from a lack of career information, career preparedness, self-understanding, and career decision-making self-efficacy. The results showed that each variable, except stress from a lack of career information, was significantly improved after the program compared to before the program, indicating that the program was effective. Theoretical and practical implications regarding career education for student-athletes are discussed in this paper.

• Journal of Labour Economics
• /
• v.39 no.2
• /
• pp.113-139
• /
• 2016

The purpose of this study is to establish evaluation model that can explain marginal effects of baseball players of Korean Baseball Organization (KBO) on their team winnings in terms of productivity. We proposed econometric model with using variables that are provided from official homepage of KBO to overcome the complexity of mainly used productivity index: wins above replacement (WAR). Also, compare to the previous studies such as Scully(1974) or Krautmann(1999) that using limited indices of baseball stats, this study included 61 indices that are provided from official homepage of KBO. We estimated regression based WAR(RBWAR) by conducting panel regression with each team's statistics data of 2002 to 2014. As a results, RBWAR shows 0.869 correlation coefficient for batters and 0.882 for pitchers with WAR in 2014 that can be concluded that two indices shows similar results. From the results of estimation, we analyze the relationship between productivity and actual contract of free agent players in 2015 and it showed that teams have contracted reasonably.